Abstract
ABSTRACTNowadays, different contemporary products are modeled in a CAD environment. These involve a number of components and assembled together to form an assembly model. Such related components of a product are assembled by different mating conditions in a product design and development stage. Normally, the assembly model would be distributed to different staffs or personnel involved in the process. To ensure that the assembly model received is an original one and is not altered by any unauthorized persons during transmission and exchange of files on the internet, watermarks should be embedded into the model nowadays. In this paper, a watermarking scheme is proposed specifically for watermarking the assembly model structure and the positions and orientations of the components. In this proposed scheme, unique component ID number is assigned to each component. For each component, a hash value is calculated based on the ID numbers of the components related to it in the assembly model tree structure. By dete...
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